EP2785567A1 - Procédé permettant de commander un système de génération d'air comprimé d'un véhicule automobile, système de génération d'air comprimé et véhicule automobile comprenant ce système - Google Patents

Procédé permettant de commander un système de génération d'air comprimé d'un véhicule automobile, système de génération d'air comprimé et véhicule automobile comprenant ce système

Info

Publication number
EP2785567A1
EP2785567A1 EP11815706.4A EP11815706A EP2785567A1 EP 2785567 A1 EP2785567 A1 EP 2785567A1 EP 11815706 A EP11815706 A EP 11815706A EP 2785567 A1 EP2785567 A1 EP 2785567A1
Authority
EP
European Patent Office
Prior art keywords
compressed air
compressor
air tank
vehicle
high pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11815706.4A
Other languages
German (de)
English (en)
Other versions
EP2785567B1 (fr
Inventor
Jean-Pascal Petit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Volvo Truck Corp
Original Assignee
Renault Trucks SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault Trucks SAS filed Critical Renault Trucks SAS
Publication of EP2785567A1 publication Critical patent/EP2785567A1/fr
Application granted granted Critical
Publication of EP2785567B1 publication Critical patent/EP2785567B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/10—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels by utilising wheel movement for accumulating energy, e.g. driving air compressors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
    • B60K6/12—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/58—Combined or convertible systems
    • B60T13/585—Combined or convertible systems comprising friction brakes and retarders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/06—Applications or arrangements of reservoirs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B60W20/19—Control strategies specially adapted for achieving a particular effect for achieving enhanced acceleration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D61/00—Brakes with means for making the energy absorbed available for use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
    • B60K6/12—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
    • B60K2006/123—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator for driving pneumatic motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Definitions

  • the invention concerns a method for controlling a compressed air generation system of an automotive vehicle.
  • the invention also concerns a compressed air generation system adapted to such a method, and an automotive vehicle comprising such a compressed air generation system.
  • Some automotive vehicles such as trucks, are equipped with a compressed air system adapted to feed pneumatically powered subsystems such as a brake system.
  • a compressed air system adapted to feed pneumatically powered subsystems such as a brake system.
  • This involves an air compressor generally adapted to compress air to a pressure comprised between 8 and 12 bars.
  • the compressor is usually driven mechanically by the driveline of the vehicle, but it may alternatively be driven by an electric motor.
  • the compressor is driven by the vehicle driveline, it is known to operate the compressor as much as possible during braking or coasting phases of the vehicle, because the energy for driving the compressor is then recovered from the vehicle deceleration rather than derived from the combustion of fuel in the vehicle engine. This allows sparing a given quantity of fuel which would have otherwise been necessary to drive the compressor. Nevertheless such strategies do not allow producing all the air needed for certain applications, such as for city buses or delivery trucks. Indeed, the compressor cannot produce enough air during the limited periods of time where energy can be recovered from the vehicle deceleration.
  • the invention aims at proposing a new method for controlling a compressed air generation system of an automotive vehicle, which optimizes the operation of the compressed air system in order to further reduce the net energy consumption related to compressed air generation.
  • the invention concerns a method for controlling a compressed air generation system of an automotive vehicle, the system comprising at least one compressor and a first compressed air tank, wherein the method includes steps of :
  • the proportion of compressed air which can be produced using the energy recovered from the vehicle deceleration can be increased, and at least part of the high pressure compressed air thus created can be used to create extra torque to be delivered to various mechanically powered subsystems of the vehicle without this torque being created at the expense of the quantity of the comparatively low pressure compressed air available for the vehicle subsystems.
  • such a method may incorporate one or several of the following features:
  • step c) at least a portion of the air of the high pressure compressed air tank is expanded in the pneumatic motor down to a pressure not inferior to the pressure of the first compressed air tank and is stored in said first compressed air tank;
  • step c) at least a portion of the torque generated at step c) is delivered to the driveline of the vehicle, for example to the engine and/or to the wheels of the vehicle;
  • step c) at least a portion of the torque generated at step c) is delivered to an alternator, to a compressor of an air conditioning system of the vehicle and/or to a compressor of a refrigerating system of a refrigerated compartment of the vehicle;
  • the compressor is driven by a driveline of the vehicle.
  • the compressor is driven by an electric motor.
  • a compressor is able to deliver pressurized air directly to the first compressed air tank.
  • the invention also concerns a compressed air generation system of an automotive vehicle, comprising at least one air compressor and a first compressed air tank, wherein the air compressor is adapted to compress air to a pressure higher than a nominal pressure of the first compressed air tank, wherein it further comprises:
  • a pneumatic motor for generating torque by expanding the compressed air stored in the high pressure compressed air tank; - and means for connecting an outlet of the pneumatic motor to the first compressed air tank.
  • such a compressed air generation system may incorporate one or several of the following features:
  • the compressor is reversible and forms the pneumatic motor for generating torque;
  • the system comprises means to selectively connect an inlet of the compressor to an atmospheric pressure air intake or to the first compressed air tank;
  • the means for generating torque comprise a pneumatic motor independent from the compressor
  • the first compressed air tank is a low pressure compressed air tank adapted to feed auxiliary pneumatically powered subsystems of the vehicle;
  • the system comprises a low pressure compressor for feeding the first air compressed air tank and a high pressure compressor for feeding the high pressure compressed air tank;
  • the low pressure and the high pressure air compressors may be connected in series to deliver compressed air to the high pressure compressed air tank.
  • the invention also concerns an automotive vehicle comprising a compressed air generation system as mentioned here above.
  • FIG. 1 is a schematic view of a portion of an automotive vehicle and a compressed air generation system according to the invention, in a first configuration
  • figure 2 is a schematic view similar to figure 1 , for a second configuration of the system of figure 1 ;
  • figure 3 is a schematic view similar to figure 1 showing a second embodiment of the invention.
  • an automotive vehicle V has a driveline comprising a main drive engine such as an internal combustion engine 2 adapted to be fed with air via an air intake manifold 4.
  • a main drive engine such as an internal combustion engine 2 adapted to be fed with air via an air intake manifold 4.
  • the vehicle could be equipped with another type of main drive engine, such as an electric motor or a combination of an electric motor and of an internal combustion engine.
  • the main drive engine operates by using up energy stored in the vehicle, such as under the form of a fuel or under the form of electric energy stored in a battery.
  • Vehicle V comprises a compressed air generation system S, including an air compressor 6 which is, in this example, driven by engine 2, for example via a belt 62 or a chain driven by an output shaft 22 of engine 2.
  • Compressor 6 can be connected and disconnected from belt 62 thanks to an optional clutch 64, in order to run the compressor 6 only when there is a need for compressed air, so that the energy consumed by the compressor is minimized.
  • Other suitable means to activate and deactivate compressor 6, or to limit the amount of energy it absorbs when no air compression is required, are described for example in documents DE-A-39 09 531 and DE-A-40 26 684.
  • compressor 6 can be a piston compressor, having intake and exhaust valves. Compressor 6 is fed with air at atmospheric pressure via an air intake pipe 10.
  • Compressor 6 could alternatively be driven by other components of the driveline of the vehicle rather than directly by the engine. It could therefore be driven by the gearbox or by the transmission to the wheels.
  • the compressor 6 could be driven by an electric motor, especially in the case of an electric or hybrid electric vehicle.
  • Compressor 6 is adapted to feed a high pressure compressed air tank 8 of system S in which compressed air is stored at a nominal pressure which can be comprised, for example, between 20 and 40 bars.
  • the compressor must thus be able to deliver air at such high pressure. It can be a multistage compressor.
  • System S further comprises a low pressure compressed air tank 12 in which compressed air is stored at a nominal pressure which is comparatively lower than the high pressure, for example comprised between 7 and 15 bars, and typically approximately 12 bars.
  • the nominal pressure is the pressure which is regulated in the low pressure reservoir during normal operation of the vehicle.
  • This low pressure corresponds to a service air pressure used to operate one or several non-represented pneumatically- powered subsystems of vehicle V, such as a braking system, a pneumatic suspension system, or any other pneumatic subsystem equipping vehicle V.
  • pneumatic door-opening actuators can be fed with air coming from tank 12.
  • the low pressure air tank 12 is pneumatically connected to one or several pneumatically-powered subsystems of vehicle V.
  • Low pressure air tank 12 is fed via an inlet pipe 120 which is connected to air intake pipe 10 for example via a three way valve 14 also connected to an air inlet of air compressor 6.
  • the air inlet of compressor 6 can be connected to low pressure air tank 12 or to the air intake 10.
  • compressor 6 is a reversible compressor.
  • compressor 6 can be used, in a first configuration, to compress air when it receives an external torque or, in a second configuration, to expand air in order to generate an output torque.
  • compressor 6 works as a pneumatic motor.
  • the invention could also be implemented with a pneumatic motor which would be distinct from the compressor.
  • compressor 6 uses a torque delivered by the driveline and compresses air entering from intake pipe 10 at atmospheric pressure as shown by arrow A1.
  • compressor 6 fills high pressure air tank 8, as shown by arrow A2.
  • three way valve 14 is controlled so that no air can enter in low pressure tank 12 nor exit from it.
  • the pneumatic motor here embodied as the compressor 6 used in reverse, is fed with a high pressure air stored in high pressure air tank 8, as shown by arrow A3.
  • air is expanded to a reduced pressure within compressor 6 and flows out of compressor 6 via air intake 10, as shown by arrow A4.
  • the air inlet of compressor 6 can be considered as an air outlet of compressor 6 operating as a pneumatic motor.
  • three way valve 14 is preferably controlled so as to connect the pneumatic motor air outlet to inlet pipe 120 of low pressure air tank 12, so that air expanded in compressor 6 in its second operating configuration fills low pressure air tank 12, rather than being released to the ambient air, at least as long as low pressure air tank is not full.
  • compressor 6 is a conventional reversible piston compressor
  • the roles of the intake and exhaust valves of compressor 6 are inverted: exhaust valves are opened to let compressed air in from high pressure tank 8, initiating pistons motion in compressor 6. Air expansion begins when exhaust valves are closed, then ends when the pistons reach their extreme position. Air is then expelled from the cylinders by opening the intake valves of compressor 6.
  • Low pressure air tank 12 and high pressure air tank 8 can be made of a metallic material and can be thermally isolated so as to limit pressure losses due to thermal exchanges with the outside of air tanks 8 and 12.
  • one or both air tanks can be made of composite fiber reinforced resin.
  • the invention works in the following way: when vehicle V is in a braking and/or coasting mode, i.e. for example when the braking system of vehicle V is actuated or when no fuel or only a minimal amount of fuel is injected in the engine, the driveline of the vehicle is not driven by engine 2. Nevertheless, the vehicle is still rolling so that at least part of the driveline is driven due to the motion of the vehicle.
  • the compressor is mechanically connected to the vehicle driveline, torque can be delivered to compressor 6 in order to compress air without fuel over-consumption.
  • the electricity used to drive the compressor can be produced by a generator which itself can be driven by the driveline with no fuel consumption penalty.
  • compressor 6 air is compressed by compressor 6 to a high pressure in order to maximize the quantity of pressurized air produced at no energy cost, since the energy used can be recovered from the kinematic energy of the vehicle. This is very useful since during such phases, quite high amounts of energy can be recovered in principle, while even electric vehicles or electric hybrid vehicles are often unable to recover all that energy due to the fact that the batteries used to store the recovered energy have power limitations which limit the amount of energy which can be effectively recovered during those relatively short periods of time. Compressed air is stored in high pressure air tank 8.
  • the air stored in high pressure air tank 8 can be used at a later time, for example when vehicle V is in power mode, i.e. when the main drive engine 2 is delivering torque to the driveline of vehicle V.
  • the extra torque generated by the inverted operation of compressor 6 can be used to bring additional power to the driveline, for example to the output shaft 22 of engine 2 or to the wheels of the vehicle, in case additional power is needed. This can be the case when additional torque must be delivered when starting vehicle V on an ascending slope.
  • the extra torque generated by compressor 6 can be used to run a compressor powering an air conditioning system of vehicle V. It can also be used to run an alternator.
  • the expanded air with which low pressure air tank 12 is filled can be used to pneumatically power some subsystems of the vehicle at any time.
  • the outlet of the pneumatic motor can be, in a non shown embodiment, connected to intake manifold 4 so as to provide engine 2 with compressed air to assist the internal combustion engine operations, especially during transient operation, such as during a sudden acceleration.
  • compressor 6 In the case of a conventional reversible piston compressor, used as pneumatic motor, the operation of compressor 6 can be controlled by managing the valve opening and closing times so as to regulate the air expanding rate.
  • the outlet pressure of compressor 6 can be controlled in accordance with the pressure of low pressure air tank 12 and the pneumatic energy needs of the pneumatically powered subsystems of vehicle V.
  • a side effect of the invention is to increase the vehicle braking efficiency by using a high pressure compressor 6, which is able to absorb a higher amount of power from the driveline compared to a compressor adapted to produce only comparatively lower pressure compressed air.
  • valves of compressor 6 can be of different types. It can be passive automatic, i.e. controlled on the basis of the balance of inlet and outlet air pressures. These valves can also be controlled thanks to a camshaft, or be electro-mechanic valves controlled independently from the position of the pistons of compressor 6, for example by an electronic control unit.
  • FIG. 3 On Figure 3 is shown a second embodiment according to the invention wherein the compressed air generation system comprises a low pressure compressor for feeding the first air compressed air tank and a high pressure compressor 6 for feeding the high pressure compressed air tank.
  • the compressed air generation system comprises a low pressure compressor for feeding the first air compressed air tank and a high pressure compressor 6 for feeding the high pressure compressed air tank.
  • a low pressure compressor 7 is added to the system and that the three way valve can be replaced by a four-way valve 14 through which an outlet of the low pressure compressor 7 can be connected either to the low pressure air tank 12, in view of directly feeding the low pressure air tank 12, or to the inlet of the high pressure compressor 6, in view of supplying the high pressure compressor tank with pre-compressed air which the high pressure compressor can compress to the high pressure prevailing in the high pressure air tank 8.
  • the low pressure compressor 7 and the high pressure air compressor 6 are pneumatically connected in series to deliver compressed air to the high pressure compressed air tank 8. They then operate as a two stage compressor.
  • the low pressure compressor 7 can be driven by the driveline, for example through a belt 72, or can be electrically driven.
  • valve 140 When high pressure air is expanded in the reversed high pressure air compressor 6, the valve 140 is preferably set to connect the high pressure compressor inlet (which is then an outlet for the partially expanded air) to the low pressure tank 12 so that the partially expanded air is stored in the low pressure tank 12.
  • Such a design can allow filling the low pressure air tank 12 at the most efficient energy cost, including during vehicle motoring mode, in cases where the vehicle operation does not allow sufficient high pressure air production during costing or braking modes.
  • the high and low pressure compressors 6, 7 may be of a different type, each best adapted to their respective pressure operating range.
  • valve 140 may also be set to connect the inlet of the high pressure compressor directly to the ambient air, both during motoring modes and during braking or coasting mode, and both during its operation as a compressor or as a pneumatic motor.
  • the invention can be implemented using, instead of a reversible compressor, a compressor and a distinct pneumatic motor to generate output torque while expanding high pressure air stored in high pressure air tank 8.
  • said distinct pneumatic motor may comprise an output shaft mechanically connected to a driveline component, such as the output shaft 22 of engine 2, or to another mechanically-powered subsystem.
  • the air inlet of the distinct pneumatic motor would then be connected to the high pressure air tank 8 and its air outlet would be connected to the low pressure air tank or to the ambient air, both though appropriate valves.
  • the compressor and the pneumatic motor may be of a different type of pneumatic machine.
  • the compressor can be a piston compressor while the pneumatic motor can be a turbine or a scroll expander.
  • transmission between engine 2 and compressor 6 in compression configuration, and/or between compressor 6 and engine 2 in expansion configuration can be at constant ratio or at variable ratio, for example using a dedicated gearbox or a continuously variable transmission.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • General Engineering & Computer Science (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

La présente invention concerne un procédé permettant de commander un système de génération d'air comprimé (S) d'un véhicule automobile (V), le système comprenant au moins un compresseur (6) et un premier réservoir d'air comprimé (12), le procédé comprenant les étapes suivantes : a) dans un mode de freinage et/ou de marche en roue libre du véhicule, comprimer l'air à une pression supérieure à une pression nominale du premier réservoir d'air comprimé (12), b) stocker l'air comprimé à l'étape a) dans un réservoir d'air comprimé à haute pression (8) du système de génération d'air comprimé (5), c) dans un mode moteur du véhicule, détendre au moins une partie de l'air du réservoir d'air comprimé à haute pression (8) dans un moteur pneumatique pour générer un couple.
EP11815706.4A 2011-11-28 2011-11-28 Procédé permettant de commander un système de génération d'air comprimé d'un véhicule automobile, système de génération d'air comprimé et véhicule automobile comprenant ce système Active EP2785567B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2011/003250 WO2013079987A1 (fr) 2011-11-28 2011-11-28 Procédé permettant de commander un système de génération d'air comprimé d'un véhicule automobile, système de génération d'air comprimé et véhicule automobile comprenant ce système

Publications (2)

Publication Number Publication Date
EP2785567A1 true EP2785567A1 (fr) 2014-10-08
EP2785567B1 EP2785567B1 (fr) 2019-12-25

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EP11815706.4A Active EP2785567B1 (fr) 2011-11-28 2011-11-28 Procédé permettant de commander un système de génération d'air comprimé d'un véhicule automobile, système de génération d'air comprimé et véhicule automobile comprenant ce système

Country Status (3)

Country Link
EP (1) EP2785567B1 (fr)
JP (1) JP5892399B2 (fr)
WO (1) WO2013079987A1 (fr)

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FR3023817B1 (fr) * 2014-07-17 2016-07-22 Chassis Brakes Int Bv Systeme de freinage pour vehicule hybride hydraulique
DE102014111523A1 (de) 2014-08-13 2016-02-18 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Druckversorgungseinrichtung mit Luftaufbereitungsanlage
US10012247B2 (en) * 2016-12-02 2018-07-03 Harris Corporation Variable booster for hybrid pneumatic regenerative system
IT201800009632A1 (it) * 2018-10-19 2020-04-19 Lamberto Lamberti Ripartitore meccanico attivo di frenata con antibloccaggio automatico puramente meccanico

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EP2785567B1 (fr) 2019-12-25
JP2015500758A (ja) 2015-01-08
JP5892399B2 (ja) 2016-03-23

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